Arch-flue clamp



- S. J. WILSON ARCH FLUE CLAMP Filed Nov. 12. 1923 WITNESSES IN VEN TOR,Sdmuelf 71 157272 504% I I BY mZ /m Patented cc. 2, 1924.

ARCH-FLUE CLAMP.

Application filed November 12, 1923.

I '0 all whom it may concern:

Be it known that I, SAMUEL J. IVILSON, a citizen of the United States,and a resident of Charlestown, in the county of Suffolk and State ofMassachusetts, have invented a new and Improved Arch-Flue Clamp, ofwhich the following is a full, clear, and exact description.

This invention relates to clamps for arch flues and has for an object toprovide an improved construction particularly adapted for arch fiues inlocomotive engines and other similar places whereby the flues are lockedin proper position temporarily untll they are properly expanded.

Another object in view is to provide a clamp for arch flues which may beadjusted to shift the fines to the exact position and hold the same inthat position while being expanded.

In the accompanying drawing Figure 1 is a fragmentary longitudinalvertical section through a locomotive boiler showing an arrangement ofarch flues with a clamp embodying the invention applied thereto.

Figure 2 is an enlarged fragmentary view of one end of the flue andassociated parts shown in Figure 1.

Figure 3 is a fragmentary transverse sectional view through Figure 2,approximately on line 33.

In different forms of boilers and particularly locomotive boilers, anumber of arch fines are provided immediately above the fire box, saidflues being used as part of the circulating system for the water. Inarranging these flues in position, they must be properly situated andthen expanded at the ends in the usual manner to produce atightconnection. As the space in the fire box is comparatively small, itis more or less diflicult to properly locate these flues and to properlyexpand the same. Heretofore, it has usually required from three to fourdays with three to four men to install a set of circulating arch fluesand sometimes the flues were not correctly positioned and sufficientlength was not allowed beyond the boiler plate.

In the accompanying drawing, a clamp has been shown which is adapted tolock the fines in correct position temporarily whereby the expandingtube may properly expand the fines and also may flare the outer ends asis now required by Government officials. As

Serial No. 674,406.

indicated particularly in Figures 2 and 3, the clamp consists of parts 1and 2, each part hav ng a semi-circular section 3 fitting against theflue and a pair of legs 4; and 5 extending toward the boiler plate. Itwill be evident from Figure 2 that these legs are spaced from the flue 6whereby the'flue may be properly expanded when the clamp is 1n position.

The parts 1 and 2 are rigidly clamped together by suitable clampingbolts 7 and 8, eachbolt having a head formed with an eye 9, saideyesbeing threaded for receiving the respectlve screw members 10 and 11.These screw members are adapted to press against the respective platesof the boiler as shown In Figure 1 in order to lock the flue 6 in properposition. It will be understood that the workmen will place one of theclamps 1n position and then insert the flue after which, the other clampis placed approximately in the correct position. After this has beendone, the various threaded members of screws 10 and 11 are operated forpressmg tightly against the boiler and thereby locking the flue inposition. If the flue is projecting beyond one plate more than theother, the flue at one end is loosened and the screws 10 and 11 at theopposite end are operated for shifting longitudinally the flue until itprojects a proper distance at each end beyond the respective boilerplates. The loosened clamp is then tightened and the screws 10 and 11thereon are tightened which will lock the flue in its correct adjustedposition. The expanding tool is then inserted and the flue is properlyexpanded, after which, the outer ends are flared as required byGovernment inspectors. This completes the insertion of the flue and theclamps may then be removed and used at another place.

What I claim is 1. An arch flue clamp, comprising means for clamping aflue near one end, and adjustable means carried by the clamping meansadapted to engage the boiler plate for moving the clamping means andflue longitudinally of the flue.

2. An arch flue clamp, comprising a clamping body formed with a pair ofclamping members, bolts for causing said clamping members to clamp aflue, and adjusting means carried by each of said bolts for adjustingthe clamp in respect to the boiler plate and for moving the fluelongitudinally to cause the same to project a proper distance throughthe boiler plate.

3. A clamp for holding circulating tlues in position, comprising aclamping body formed in two sections, each section having a pair ofdepending legs spaced further apart than the diameter of the fines, apair of clamping bolts for clamping said sections to a flue, each of theclamping bolts being pro vided with a threaded eye, and a screw memberpositioned in said threaded eyes -lor adjusting the clamp when in use.

4. A clamp for temporarily holding the circular flues in correctposition for being expanded, said clamp comprising a body formed withdepending legs adapted to extend to a position near the end of the flueon which the clamp is positioned, said legs being spaced a suilicientdistance away from the flue to permit expanding thereof, and meanscarried by said body extending parallel with said legs for adjusting thebody and flue in one direction.

5. A clamp for a circulating flue for locomotive boilers, comprisingclamping members adapted to be connected to said flue near each end forlocking the same in position while being expanded, and means coactingwith the locking means for adjusting the flue longitudinally toaccurately position the flue for subsequent expanding.

SAMUEL J. WILSON.

